Lennox Hearth VIS35 - Manual (Page 24)

4 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
f
uel
C
onversion
Converting the stove between natural gas and LP can be ac-
complished by either changing the cassette (valve and pilot
assembly) or installing a conversion kit (regulator, burner
orifice, and pilot orifice). Only a qualified service technician
should perform the conversion.
Cassette Removal:
1. Be sure the gas supply is shut off and if the stove has an
optional blower installed the electrical supply is shut off
at the electrical panel before beginning the conversion.
Disconnect the gas supply from the stove, being careful
not to apply pressure to the valve in the process.
2. Remove the log set (see Baffle, Log Set, & Ember Instal-
lation).
3. Remove the allen head screw (A in Figure 38) at the left
end of the burner. Lift out the air control panel.
4. Pull the burner from the orifice and remove the wire
linkage connected to the burner air shutter.
5. Remove the labeled cover through which the valve
control knobs protrude by removing the two allen head
screws securing it and slide it off the valve knobs.
6. Mark and disconnect wires on valve terminals #1 and
#3 connected to the burner on/off switch, thermostat,
or remote control.
7. From inside the firebox, remove the two allen head
screws (screws C in Figure 37) and the bracket they
secure.
8. From inside the firebox, remove all four of the allen
head screws (B in Figure 37) fastening the cassette to
the firebox. The cassette is sealed to the stove using
high temperature cement. It may be necessary to cut
through this cement to remove the cassette.
9. Grasp the cassette assembly from below the firebox
and pull it away from the firebox.
10. Install new, converted, or serviced cassette in the reverse
order of removal. Apply a bead of high temperature
silicone prior to securing the cassette with the allen
head screws. All surfaces of cassette must be sealed
to the firebox to ensure an air tight seal.
11. All parts and wires must be correctly reinstalled to
ensure safe and proper operation of the unit.
A
Air Control Panel
Cassette Assembly
B
B
C
Conversion Kit
Please see instructions provided with conversion kit.
Figure 7
Figure 8